16516279291793 has 2 divisors, whose sum is σ = 16516279291794. Its totient is φ = 16516279291792.

The previous prime is 16516279291783. The next prime is 16516279291819. The reversal of 16516279291793 is 39719297261561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9906202297744 + 6610076994049 = 3147412^2 + 2571007^2 .

It is a cyclic number.

It is not a de Polignac number, because 16516279291793 - 2⁴ = 16516279291777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16516279291723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258139645896 + 8258139645897.

It is an arithmetic number, because the mean of its divisors is an integer number (8258139645897).

Almost surely, 2^{16516279291793} is an apocalyptic number.

It is an amenable number.

16516279291793 is a deficient number, since it is larger than the sum of its proper divisors (1).

16516279291793 is an equidigital number, since it uses as much as digits as its factorization.

16516279291793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77157360, while the sum is 68.

The spelling of 16516279291793 in words is "sixteen trillion, five hundred sixteen billion, two hundred seventy-nine million, two hundred ninety-one thousand, seven hundred ninety-three".